List of analyses by HERAFitter

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Logo of HERAFitter

logo.png, logo.eps, logo.pdf

Timefllow HERAFitter

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Developers HERAFitter

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Workflow HERAFitter

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NAF Workflow HERAFitter

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QCD analysis of W- and Z-boson production at Tevatron [arXiv:1503.05221]

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Figure 1 Theoretical predictions evaluated with the PDFs extracted from a fit to the HERA I and Tevatron data are compared to (a) Z-boson differential cross section as a function of rapidity, measured by the D0 collaboration and (b) Z-boson differential cross section as a function of rapidity, measured by the CDF collaboration

Fig1_a.eps, Fig1_b.eps

Figure 2 Theoretical predictions evaluated with the PDFs extracted from a fit to the HERA I and Tevatron data are compared to (a) the charge asymmetry of muons as a function of rapidity in W -> μ nu decays, measured by the D0 collaboration, (b) the W-boson charge asymmetry as a function of rapidity in the W -> e nu decay channel, measured by the CDF collaboration, and (c) the W-boson charge asymmetry as a function of rapidity in the W -> e nu decay channel, measured by the D0 collaboration.

Fig2_a.eps, Fig2_b.eps, Fig2_c.eps

Figure 3 PDFs at the starting scale Q2 = 1.7 GeV2 as a function of Bjorken-x for (a) uv, (b) dv, (c) ubar, and (d) dbar, determined with a fit to the HERA I data (blue), and with a fit to the HERA I and Tevatron W- and Z-boson data (yellow)

Fig3_a.eps, Fig3_b.eps, Fig3_c.eps, Fig3_d.eps

Figure 4 Relative PDF uncertainties at the starting scale Q2 = 1.7 GeV2 as a function of Bjorken-x for (a) uv, (b) dv, (c) ubar, and (d) dbar, determined with a fit to the HERA I data (blue), and with a fit to the HERA I and Tevatron W- and Z-boson data (yellow)

Fig4_a.eps, Fig4_b.eps, Fig4_c.eps, Fig4_d.eps

Figure 5 (a) d-valence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorken-x and (b) d-valence relative PDF uncertainties, determined with a fit to the HERA I data (blue), with a fit to the HERA I and Tevatron W-boson asymmetry and Z-boson data (yellow), and with a fit to the HERA I and Tevatron W-boson lepton asymmetry and Z-boson data (green)

Fig5_a.eps, Fig5_b.eps

Figure 6 d-valence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorken-x before and after profiling for the (a) CT10nlo and (c) MMHT2014 PDFs and the corresponding relative uncertainties for (b) CT10nlo and (c) MMHT2014

Fig6_a.eps, Fig6_b.eps, Fig6_c.eps, Fig6_d.eps

Figure 7 (a) d-valence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorken-x determined from a fit to the HERA I and Tevatron W- and Z-boson data, and from the CT10nlo and MMHT2014 PDFs; (b) ratio of d-valence PDFs central values and uncertainties with respect to the d-valence PDF determined from a fit the HERA I and Tevatron W- and Z-boson data

Fig7_a.eps, Fig7_b.eps

Figure 8 (a) d-valence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorken-x determined from a fit to the HERA I and Tevatron W- and Z-boson data, and from the profiled CT10nlo and MMHT2014 PDFs; (b) ratio of d-valence PDFs central values and uncertainties with respect to the d-valence PDF determined from a fit the HERA I and Tevatron W- and Z-boson data

Fig8_a.eps, Fig8_b.eps

Supplementary Material

Theoretical predictions evaluated with the CT10nlo (red) MMHT2014 (blu) and NNPDF3.0 (green) PDF sets are compared to the W-boson charge asymmetry as a function of rapidity in the W -> e nu decay channel, measured by the D0 collaboration. The dashed areas correspond to the PDF uncertainties of the theoretical predictions. The yellow bands show the total experimental uncertainty, the black vertical bars show the quadratic sum of statistical and systematic uncorrelated uncertainties

Fig_supl.pdf

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Parton distribution functions at LO, NLO and NNLO with correlated uncertainties between orders [EPJC (2014) 74: 3039, arXiv:1404.4234]

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Distribution of chi2/Ndof for fits to 1337 data replicas at LO, NLO and NNLO. The vertical line indicates the expected mean value of the chi2 distribution for the fits to the data replicas in the MC method (2 Ndof)

chi2_distr_all-eps-converted-to.pdf

Correlation of chi2/Ndof between NLO and NNLO fits

chi2_fit_nlo_vs_fit_nnlo-eps-converted-to.pdf

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (uval).

q2_2_pdf_uv-eps-converted-to.pdf, q2_2_pdf_uv_ratio-eps-converted-to.pdf

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (dval).

q2_2_pdf_dv-eps-converted-to.pdf, q2_2_pdf_dv_ratio-eps-converted-to.pdf

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (UBar).

q2_2_pdf_UBar-eps-converted-to.pdf, q2_2_pdf_Ubar_ratio-eps-converted-to.pdf

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (DBar).

q2_2_pdf_DBar-eps-converted-to.pdf, q2_2_pdf_DBar_ratio-eps-converted-to.pdf

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (g).

q2_2_pdf_g-eps-converted-to.pdf, q2_2_pdf_g_ratio-eps-converted-to.pdf

Correlation coefficients, given in percent and represented by different colours, among different PDFs at NLO and NNLO at the starting scale Q2=1.7GeV2 and x-grid points. From top to bottom, the panels show correlation coefficients for the xuv, xdv, xUBar, xDBar and xg distributions. The left column corresponds to the original MC-method calculation and the right shows the result of the eigenvector representation. Each panel shows the correlation coefficients as a function of the x-grid point for the NLO (bins 1-97) and NNLO (bins 98-194) PDFs. Bins 0, 27, 43, 62, 78 and 97 correspond to anchor points at x=0.00001, 0.01, 0.1, 0.4, 0.7 and 1.0 with logarithmic x spacing between them.

uv_corr.pdf, dv_corr.pdf, ubar_corr.pdf, dbar_corr.pdf, g_corr.pdf

Correlation of the cross-section predictions for Z boson production calculated at NLO and NNLO.

ZZNNLO_ellipse-eps-converted-to.pdf

|Correlation of the cross-section predictions for WW di-boson and Z boson production both calculated at NLO

WWZNLO_ellipse-eps-converted-to.pdf

Correlation of the cross-section predictions for WW di-boson calculated at NLO and Z boson production both calculated at NNLO

WWZNNLO_ellipse-eps-converted-to.pdf

Ratio of the WW di-boson to Z boson production cross sections calculated at NLO and NLO/NNLO compared to the result obtained by the CMS collaboration (hatched area). The inner, middle and outer filled error bars of the predictions indicate experimental and full PDF uncertainties and the total uncertainty calculated as the scale and full PDF uncertainties added in quadrature, respectively.

WWZ_ratio-eps-converted-to.pdf

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HERAFitter: HERAFitter/results/Meterial (last edited 2015-03-24 21:25:40 by RingailePlacakyte)